| 摘要 |
PURPOSE:To obtain an alkaline storage battery having high capacity, low internal pressure, and increased safety by using a hydrogen absorption electrode comprising a plurality of hydrogen absorption alloys having different hydrogen equilibrium dissociation pressure or hydrides of these hydrogen absorption alloys. CONSTITUTION:A hydrogen absorption electrode comprising two or more hydrogen absorption alloy powder having different hydrogen equilibrium pressure or hydride powder of these alloys is used. One or more hydrogen absorption alloy powder having a hydrogen equilibrium dissociation pressure of 1atm. or less is preferable to be contained in the hydrogen absorption alloy powder. 5-20wt% hydrogen absorption alloy having a hydrogen equilibrium dissociation pressure of 1-5atm. is preferable to be mixed to a plurality of hydrogen absorption alloys having different hydrogen equilibrium dissociation pressure. Thereby, discharge capacity is increased, and gas evolution during charge-discharge is decreased, and increase in internal pressure of the battery is suppressed. |
